66121057358 has 8 divisors (see below), whose sum is σ = 100578510000. Its totient is φ = 32594887360.

The previous prime is 66121057283. The next prime is 66121057399. The reversal of 66121057358 is 85375012166.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×66121057358² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232820483 + ... + 232820766.

It is an arithmetic number, because the mean of its divisors is an integer number (12572313750).

Almost surely, 2^66121057358 is an apocalyptic number.

66121057358 is a deficient number, since it is larger than the sum of its proper divisors (34457452642).

66121057358 is a wasteful number, since it uses less digits than its factorization.

66121057358 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 465641322.

The product of its (nonzero) digits is 302400, while the sum is 44.

The spelling of 66121057358 in words is "sixty-six billion, one hundred twenty-one million, fifty-seven thousand, three hundred fifty-eight".